摘要
玛东2井区二叠系佳木河组发育一套火山岩,在部分探井中发现了油气,通过岩心观察、地震预测等技术开展研究区火山岩特征的研究。研究区火山岩岩性以玄武岩为主,发育少量安山岩、凝灰岩。通过岩心观察、地震储层预测等研究,认为研究区发育火山爆发相、火山溢流相、火山沉积相及火山通道相4种相带。研究区主要发育3个火山喷发群,结合前人对盆地构造演化的研究成果认为,佳木河组形成时期,盆地处于断裂扩张期,断裂活动强烈,极易形成裂隙式喷发。因此,提出佳木河组发育裂隙-中心式喷发模式。
There is a set of volcanic rocks in Jiamuhe Formation of Permian in madong-2 area.Oil and gas have been found in some exploration wells.The volcanic rock characteristics in the research area are studied by core observation and earthquake prediction.The lithology of volcanic rocks in the study area is mainly basalt.A small amount of andesite and tuff are developed.Through core observation and seismic reservoir prediction,it is considered that there are four facies belts:volcanic eruption facies,volcanic overflow facies,volcanic sedimentary facies and volcanic channel facies.There are mainly three volcanic eruption groups in the study area.Combined with the previous studies on the tectonic evolution of the basin,it is considered that the basin was in the period of fault expansion during the formation of Jiamuhe Formation,with strong fault activity,and it is easy to form fissure eruption during the period of fault activity.Therefore,the fissure central eruption mode of Jiamuhe Formation is proposed.
作者
谭建华
佟莹
张永波
黄会会
连志刚
Tan Jianhua;Liu Mingyang;Tong Ying;Huang Huihui;Zhang Yongbo(Xinjiang Oilfield Company of PetroChina,Karamay,Xinjiang,834000,China;Xinjiang Haodeng Technology Co.,Ltd,Urumqi,Xinjiang,830000,China)
出处
《新疆地质》
CAS
CSCD
2021年第3期443-447,共5页
Xinjiang Geology
基金
国家油气重大专项(2016ZX05046-006)
中国石油科技重大专项(2017E-0402.2019E-26)资助联合资助。
关键词
准噶尔盆地
玛东地区
佳木河组
火山岩
喷发模式
Junggar basin
Madong area
Jiamuhe Formation
Volcanic rocks
Eruption model
